package com.example.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

@Service
@Slf4j
public class PaymentService {
    public String paymentInfo_OK(Long id) {
        return "线程池：" + Thread.currentThread().getName() + " PaymentInfo_OK,id:" + id;
    }

    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler"/*指定善后方法名*/, commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    public String paymentInfo_Timeout(Long id) {
        try {
            TimeUnit.SECONDS.sleep(3);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        log.info("timeout method");
        return "线程池：" + Thread.currentThread().getName() + " PaymentInfo_Timeout,id:" + id;
    }

    public String paymentInfo_TimeOutHandler(Long id) {
        //兜底方法，除了函数名其它函数签名必须和之前一样；
        // 超时或者运行异常都会走到该方法
        return "线程池：" + Thread.currentThread().getName() + " PaymentInfo_TimeoutHandler,id:" + id;
    }

    //服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),// 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),// 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),// 失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(Long id) {
        if (id < 0) {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName() + "\t" + "调用成功，流水号: " + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(Long id) {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " + id;
    }
}
